Problems from Spotify Challenge 2011

Submissions Users
Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
All Just A Dream 1659 380 23% 0.05 261 182 70% 6.6
Cat Coat Colors 169 72 43% 0.00 67 59 88% 3.9
Imperial Measurement 1386 621 45% 0.00 564 522 93% 2.0
Peer Streaming 26 9 35% 0.04 14 9 64% 7.7
Playlist 242 41 17% 1.09 27 12 44% 9.3
Primary Register 1020 625 61% 0.00 544 510 94% 2.0
Square Pie 371 147 40% 0.07 36 27 75% 6.3
Wheel Game 31 10 32% 0.00 13 10 77% 6.7